In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 25:

exec_prefix=${prefix}

^---------^ SC2034 (warning): exec_prefix appears unused. Verify use (or export if used externally).

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 26:

includedir=${prefix}/include

^--------^ SC2034 (warning): includedir appears unused. Verify use (or export if used externally).

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 52:

    exit $1

         ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

    exit "$1"

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 64:

    -*=*) value=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;

                ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 

    -*=*) value=$(echo "$1" | sed 's/[-_a-zA-Z0-9]*=//') ;

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 65:

    *) value= ;

       ^---^ SC2034 (warning): value appears unused. Verify use (or export if used externally).

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 104:

        cmajor=`echo $checkfor | cut -d. -f1`

               ^----------------------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

                     ^-------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

        cmajor=$(echo "$checkfor" | cut -d. -f1)

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 105:

        cminor=`echo $checkfor | cut -d. -f2`

               ^----------------------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

                     ^-------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

        cminor=$(echo "$checkfor" | cut -d. -f2)

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 108:

        cpatch=`echo $checkfor | cut -d. -f3 | cut -d- -f1`

               ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

                     ^-------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

        cpatch=$(echo "$checkfor" | cut -d. -f3 | cut -d- -f1)

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 109:

        checknum=`echo "$cmajor*256*256 + $cminor*256 + ${cpatch:-0}" | bc`

                 ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 

        checknum=$(echo "$cmajor*256*256 + $cminor*256 + ${cpatch:-0}" | bc)

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 110:

        numuppercase=`echo 072b00 | tr 'a-f' 'A-F'`

                     ^----------------------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 

        numuppercase=$(echo 072b00 | tr 'a-f' 'A-F')

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 111:

        nownum=`echo "obase=10; ibase=16; $numuppercase" | bc`

               ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 

        nownum=$(echo "obase=10; ibase=16; $numuppercase" | bc)

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 151:

          echo ${CURLLIBDIR}-lcurl -lssl -lcrypto -lz

               ^-----------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

          echo "${CURLLIBDIR}"-lcurl -lssl -lcrypto -lz

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/bin/curl-config line 153:

          echo ${CURLLIBDIR}-lcurl

               ^-----------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

          echo "${CURLLIBDIR}"-lcurl

For more information:

  https://www.shellcheck.net/wiki/SC2034 -- exec_prefix appears unused. Verif...

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...

  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...